The PoolTeQ has this interaction in the low band, (again: the user manuals have all infos about the libraries and how to use them). I have sampled it in the old library and it will be retained in the next v2 also.
The units sampled are TWO ORIGINAL vintage equalizers from early '50 totally refurbished (They cost more than 10.000 Euro).

"when you need more than one band of equalization you should use the LE presets and as last band the HQ. This interaction gives the right color and harmonic contents. However if you want more color and saturation you can use more HQ bands at your taste."

If I have one band on my master bus (for ex a High Shelf HQ), then on my tracks they all would use LE?

"when you need more than one band of equalization you should use the LE presets and as last band the HQ. This interaction gives the right color and harmonic contents. However if you want more color and saturation you can use more HQ bands at your taste."

If I have one band on my master bus (for ex a High Shelf HQ), then on my tracks they all would use LE?

Not quite right there.

What Alex suggested is to use the HQ presets and LE preset after the HQ in general may it be on tracks or master. You can opt to use a few HQ version on a single track if you desire so.

ok thanks, so if I understand correctly then, this "authentic" approach applies within a single track, but not applied to the entire signal flow. In such a case for example, a single track would have 1 HQ and 1+ LE presets, and likewise the master bus would first use an HQ and subsequent bands using LEs.

There seems some confusion here, complicated by how one routes their audio signal.

If I can help clarify ...

The HQ presets each contain the full 'harmonic' character of a sampled device.

The LE are presets are without this harmonic content. [clean]

If one wishes to emulate a particular unit, yet is using several presets in a chain, then the initial presets would be LE versions ... the last preset in the chain would be HQ.

Granted, how a signal gets routed through the DAW is a variable. There are many possibilities based on intent.

We should also be mindful that each HQ preset 'may' have its' own unique harmonic character. These can also be influence, with say, an equalizer band ... are we cutting or boosting.

The beauty ... the user can design a custom signal flow to allow a truer emulation, or greater/lesser emulation based on how many LE and/or HQ are chosen.

Dealing with BUS and Master sections can complicate this arrangement. This can be a factor when 'rendering', or 'freezing' individual tracks. If LE and HQ's are split across a track and a BUS, then the 'rendering' needs to take this into consideration.

ericzang wrote:ok thanks, so if I understand correctly then, this "authentic" approach applies within a single track, but not applied to the entire signal flow. In such a case for example, a single track would have 1 HQ and 1+ LE presets, and likewise the master bus would first use an HQ and subsequent bands using LEs.

The text below is taken from MLEQ pdf. I use this simple approach with HQ preset for boost and LE preset for cuts.

Take in mind that every preset (every EQ band) has his proper harmonic contents, so they are different into low, mid and high. Normally you should use the FULL (HQ) program for the band that you want to boost and ND (LE) program for cut. In this way you'll have the closest sound to the original hardware but of course you can mix the programs at your personal taste.